package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.vo.OrderReportVO;
import com.sky.vo.SalesTop10ReportVO;
import com.sky.vo.TurnoverReportVO;
import com.sky.vo.UserReportVO;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.util.StringUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper  orderMapper;
    @Autowired
    private UserMapper  userMapper;
    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //  创建一个List<LocalDate>集合，存放查询的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //  创建一个List<Double>集合，存放查询的营业额数据
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList){
            //  根据日期查询营业额数据,状态为已完成的订单
            LocalDateTime  beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        List<Double> turnoverList1 = turnoverList;


        String join = StringUtils.join(dateList, ",");
        TurnoverReportVO turnoverReportVO = new TurnoverReportVO();
        turnoverReportVO.setDateList(join);
        turnoverReportVO.setTurnoverList(StringUtils.join(turnoverList, ","));
        return turnoverReportVO;
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 查询每天新增用户数据 select count(id) from user where create_time between ? and ?
        List<Integer> newUserList = new ArrayList<>();
        //  查询总用户数据
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("end",endTime);
            //总用户数量
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin",beginTime);
            //新增用户数量
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        UserReportVO userReportVO = new UserReportVO();
        userReportVO.setDateList(StringUtils.join(dateList,","));
        userReportVO.setNewUserList(StringUtils.join(newUserList,","));
        userReportVO.setTotalUserList(StringUtils.join(totalUserList,","));
        return userReportVO;
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //  遍历集合，查询每天订单数据
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList){
            //查询每天的订单数据 select count(id) from orders where order_time between ? and ?

            //查询每天的有效订单 select count(id) from orders where order_time between ? and ? and status = 4
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        // 计算区间内的订单总数（流为空时返回0）
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

// 计算区间内的有效订单（流为空时返回0）
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //  计算订单完成率
        double orderCompletionRate=0.0;
        if (totalOrderCount != 0){
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        OrderReportVO orderReportVO = new OrderReportVO();
        orderReportVO.setDateList(StringUtils.join(dateList,","));
        orderReportVO.setOrderCountList(StringUtils.join(orderCountList,","));
        orderReportVO.setValidOrderCountList(StringUtils.join(validOrderCountList,","));
        orderReportVO.setTotalOrderCount(totalOrderCount);
        orderReportVO.setValidOrderCount(validOrderCount);
        orderReportVO.setOrderCompletionRate(orderCompletionRate);
        return orderReportVO;
    }



    /**
     * 根据条件查询订单数据
     * @param begin
     * @param end
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        //  查询每天的订单数据 select count(id) from orders where order_time between ? and ?
       Map map=new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }
    /**
     * 统计销量排名
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
       String nameList = StringUtils.join(names, ",");
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");
        SalesTop10ReportVO salesTop10ReportVO = new SalesTop10ReportVO(nameList, numberList);
        return salesTop10ReportVO;
    }

}
